Mingw: Difference between revisions

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'''English''' [[MinGW_Bulgarian|Български]]
 
[[Category:Tools]]
 
= MinGW =
 
MinGW is a free and open source Windows port of the GCC compiler and related tools. Qt supports MinGW as a platform on Windows in addition to Visual Studio compiler by Microsoft. However, it can also be used as a cross-compiler e.g. on Unix (currently not officially supported).
 
[[Qt Creator]] supports compiling with a MinGW toolchain out of the box.
 
= MinGW distributions and versions =
 
There are actually different MinGW toolchains and packages available:
 
[http://www.mingw.org MinGW.org] is the original project. The latest version gcc 4.7.2. It only compiles for 32 bit binaries.
 
[http://mingw-w64.sourceforge.net MinGW-w64] is a fork with the original aim to also support generation of 64 bit binaries. By now it also supports a much larger part of the Win32 API. The MinGW-w64 project does host several different binary packages, done by different people.
 
There are binary installers targetting MinGW for both Qt 4 and Qt 5. Up to Qt 4.8.6, Qt 4 ones are built with a MinGW.org toolchain using gcc 4.4. Newer Qt 4.8 binary packages ship with a mingw-w64 based toolchain. For Qt 5, a newer MinGW-w64 toolchain is actually required.
 
= MinGW Toolchains used in Qt binary packages =
 
{|
|+
| Qt Version
| MinGW toolchain
|-
| Qt 4.8.5
| The binary packages were compiled mingw.org gcc 4.4 toolchain that is unfortunately not officially provided anymore.
|-
| Qt 4.8.6
| [http://sourceforge.net/projects/mingw-w64/files/Toolchains mingw-builds i686-4.8.2-release-posix-dwarf-rt_v3-rev3] targetting Win32/Personal Builds/mingw-builds/4.8.2/threads-posix/dwarf/i686-4.8.2-release-posix-dwarf-rt_v3-rev3.7z/download
|-
| Qt 5.0
| [http://sourceforge.net/projects/mingwbuilds/files/host-windows/releases/4.7.2/32-bit/threads-posix/sjlj/x32-4.7.2-release-posix-sjlj-rev8.7z/download mingw-builds x32-4.7.2-release-posix-sjlj-rev8]
|-
| Qt 5.1
| [http://sourceforge.net/projects/mingwbuilds/files/host-windows/releases/4.8.0/32-bit/threads-posix/dwarf/x32-4.8.0-release-posix-dwarf-rev2.7z/download mingw-builds x32-4.8.0-release-posix-dwarf-rev2]
|-
| Qt 5.2-5.3
| [http://sourceforge.net/projects/mingw-w64/files/Toolchains mingw-builds i686-4.8.2-release-posix-dwarf-rt_v3-rev3] targetting Win32/Personal Builds/mingw-builds/4.8.2/threads-posix/dwarf/i686-4.8.2-release-posix-dwarf-rt_v3-rev3.7z/download
|-
| Qt 5.4
| [http://sourceforge.net/projects/mingw-w64/files/Toolchains mingw-builds i686-4.9.1-release-posix-dwarf-rt_v3-rev2] targetting Win32/Personal Builds/mingw-builds/4.9.1/threads-posix/dwarf/i686-4.9.1-release-posix-dwarf-rt_v3-rev2.7z/download
|}
 
= Common problems =
 
=== Link error 'Undefined reference to _Unwind_Resume' ===
 
This error occurs if object files / libraries being linked are compiled with different versions of mingw. The following steps can fix a problem:
# Execute <code>mingw32-make distclean</code> in order to remove all object files that was compiled with different mings versions.
# Explicitly set library path by setting <code>LIBRARY_PATH</code> environment variable, for example <code>set LIBRARY_PATH=c:010.04\mingw\lib</code>. gcc linker have a very complicated library search algorithm[1] that can result in wrong library being linked (for example, mingw can find installation of strawberry perl in PATH and use it's library).

Latest revision as of 00:08, 21 August 2015

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